Reference: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=10152
We removed the HWP that should not be there.
13.5mW total coming to 80:20 splitter for PDH and WFS.
HWP in question is just upstream of this 80:20.
There is a 50:50 splitter for splitting 20% into 10% each for WFSA and WFSB.
(total 13.5mW) | Before removing HWP | After removing HWP |
80:20 PDH path | 11.9mW | 12.2 |
80:20 WFS path | 1.83 | 1.57 |
50:50 WFSA path | 0.85 | 0.84 |
50:50 WFSB path | 0.92 | 0.71 |